Analysis of the third harmonic for class-F power amplifiers with an I V knee effect
Zhao Bo-Chaoa), Lu Yanga), Wei Jia-Xingb), Dong Liangb), Wang Yia), Cao Meng-Yia), Ma Xiao-Huab), Hao Yuea)†
       
Curve between the relative third harmonic voltage k and the fundamental voltage V 1.